Consolidated Statements of Cash Flows (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Cash Flows from Operating Activities
Net income	$ 39,330	$ 38,075	$ 34,865
Adjustments to reconcile net income to net cash provided by operating activities:
Bad debt expense (recovery)	112	336	(64)
Deferred income taxes	2,434	13,637	(4,623)
(Gain) loss on disposal of fixed assets	(15)	122	(13)
Non-cash equity compensation	8,891	8,770	6,658
Depreciation and amortization	20,715	23,878	19,808
Amortization of debt issue costs	476	562	499
Deferred rent	2,606	3,594	2,235
Changes in operating assets and liabilities, net of the effect of acquisitions:
Contract receivables	829	12,457	(18,147)
Prepaid expenses and other assets	(3,619)	(162)	(1,043)
Accounts payable	730	2,604	7,996
Accrued salaries and benefits	3,699	(4,154)	4,703
Accrued expenses	42	1,619	2,822
Deferred revenue	(2,706)	(2,638)	(692)
Income tax receivable and payable	6,749	(10,451)	466
Restricted cash	150	(807)	1,971
Other liabilities	609	(201)	2,080
Net Cash Provided by Operating Activities	81,032	87,241	59,521
Cash Flows from Investing Activities
Capital expenditures for property and equipment and capitalized software	(14,161)	(13,561)	(10,234)
Payments for business acquisitions, net of cash received	(4,763)	(9,974)	(108,009)
Net Cash Used in Investing Activities	(18,924)	(23,535)	(118,243)
Cash Flows from Financing Activities
Advances from working capital facilities	139,215	172,270	213,138
Payments on working capital facilities	(204,215)	(212,270)	(153,138)
Debt issue costs		(1,955)	(8)
Proceeds from exercise of options	3,103	78	478
Tax benefits of stock option exercises and award vesting	1,213	804	227
Net payments for stockholder issuances and buybacks	(7,447)	(11,569)	(898)
Net Cash (Used in) Provided by Financing Activities	(68,131)	(52,642)	59,799
Effect of Exchange Rate Changes on Cash	251	(436)	(281)
(Decrease) Increase in Cash	(5,772)	10,628	796
Cash, beginning of period	14,725	4,097	3,301
Cash, end of period	8,953	14,725	4,097
Cash paid during the period for:
Interest	2,459	3,243	2,334
Income taxes	13,670	20,377	26,411
Non-cash investing and financing transactions:
Fair value of contingent consideration payable in connection with acquisition	$ 2,842